A crescent moon is seen below planets Jupiter (L) and Venus (R) in the sky over Nairobi, capital of Kenya, Dec. 1, 2008. A rare astronomical phenomenon was seen across the world Monday night as two of the brightest naked-eye planets, Venus and Jupiter, joined a thin crescent moon in the sky. On Sunday night, the two planets appeared closest together in an event known as "Planetary Conjunction".[Xu Suhui/Xinhua]